/* ==================== GLOBAL STYLES ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-pink: #ff6b9d;
    --secondary-pink: #ffc2d1;
    --light-pink: #fff0f3;
    --deep-red: #c9184a;
    --white: #ffffff;
    --text-dark: #2d2d2d;
    --text-light: #555555;
    --gradient-romantic: linear-gradient(135deg, #ff6b9d 0%, #ff8fab 50%, #ffc2d1 100%);
    
    /* Font ailesi değişkenleri */
    --font-romantic: 'Dancing Script', cursive;
    --font-elegant: 'Playfair Display', serif;
    --font-body: 'Quicksand', sans-serif;
    --font-letter: 'Cormorant Garamond', serif;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background: var(--light-pink);
    min-height: 100vh;
    overflow-x: hidden;
    color: var(--text-dark);
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ==================== FLOATING HEARTS ==================== */
.hearts-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.floating-heart {
    position: absolute;
    font-size: 20px;
    animation: floatUp 8s ease-in infinite;
    opacity: 0.6;
}

@keyframes floatUp {
    0% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 0.6;
    }
    90% {
        opacity: 0.6;
    }
    100% {
        transform: translateY(-100px) rotate(720deg);
        opacity: 0;
    }
}

/* ==================== SECTIONS ==================== */
.section {
    min-height: 100vh;
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    position: relative;
    z-index: 1;
}

.section.active {
    display: flex;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-family: var(--font-romantic);
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--deep-red);
    margin-bottom: 15px;
    letter-spacing: 1px;
    text-shadow: 1px 1px 2px rgba(201, 24, 74, 0.1);
}

.section-header p {
    font-family: var(--font-elegant);
    font-size: 1.25rem;
    font-style: italic;
    color: var(--text-light);
    font-weight: 400;
    letter-spacing: 0.5px;
}

/* ==================== INTRO SECTION ==================== */
#intro {
    background: var(--gradient-romantic);
    text-align: center;
}

.intro-content {
    max-width: 650px;
}

.intro-title {
    font-family: var(--font-romantic);
    font-size: 4rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 25px;
    text-shadow: 2px 2px 8px rgba(0,0,0,0.15);
    line-height: 1.3;
    letter-spacing: 1px;
}

.intro-subtitle {
    font-family: var(--font-elegant);
    font-size: 1.5rem;
    font-style: italic;
    color: rgba(255,255,255,0.95);
    margin-bottom: 50px;
    font-weight: 400;
    letter-spacing: 0.5px;
}

.heart-btn {
    background: var(--white);
    border: none;
    padding: 20px 50px;
    border-radius: 50px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 15px;
    margin: 0 auto;
    box-shadow: 0 10px 40px rgba(201, 24, 74, 0.3);
    transition: all 0.3s ease;
}

.heart-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 50px rgba(201, 24, 74, 0.4);
}

.heart-icon {
    font-size: 2.5rem;
    animation: heartbeat 1s ease-in-out infinite;
}

@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

.btn-text {
    font-family: var(--font-body);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--deep-red);
    letter-spacing: 0.5px;
}

/* ==================== TIMELINE SECTION ==================== */
#timeline {
    background: var(--light-pink);
    padding: 60px 20px;
}

.timeline-container {
    position: relative;
    max-width: 800px;
    width: 100%;
}

.timeline-container::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 100%;
    background: var(--gradient-romantic);
    border-radius: 2px;
}

.timeline-item {
    display: flex;
    align-items: center;
    margin-bottom: 60px;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.timeline-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.timeline-item:nth-child(odd) {
    flex-direction: row;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-content {
    flex: 1;
    padding: 30px;
    background: var(--white);
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(255, 107, 157, 0.15);
    position: relative;
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-right: 50px;
    text-align: right;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-left: 50px;
    text-align: left;
}

.timeline-date {
    display: inline-block;
    background: var(--gradient-romantic);
    color: var(--white);
    padding: 10px 22px;
    border-radius: 20px;
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 15px;
    letter-spacing: 0.5px;
}

.timeline-title {
    font-family: var(--font-romantic);
    font-size: 2rem;
    font-weight: 600;
    color: var(--deep-red);
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}

.timeline-text {
    font-family: var(--font-elegant);
    font-size: 1.1rem;
    font-style: italic;
    color: var(--text-light);
    line-height: 1.7;
    font-weight: 400;
}

.timeline-dot {
    width: 20px;
    height: 20px;
    background: var(--deep-red);
    border-radius: 50%;
    position: absolute;
    left: 50%;
    top: 30px;
    transform: translateX(-50%);
    z-index: 1;
    box-shadow: 0 0 0 5px var(--secondary-pink);
}

.timeline-image {
    width: 100%;
    height: auto;
    max-height: 400px;
    object-fit: contain;
    border-radius: 15px;
    margin-top: 15px;
    background: linear-gradient(135deg, var(--secondary-pink) 0%, var(--light-pink) 100%);
    transition: opacity 0.3s ease, transform 0.3s ease;
    position: relative;
    z-index: 2;
}

.timeline-image:hover {
    transform: scale(1.02);
}

.timeline-image.loading {
    opacity: 0.5;
}

.timeline-image.loaded {
    opacity: 1;
}

.timeline-image.error {
    opacity: 0.7;
    filter: grayscale(50%);
}

/* ==================== REASONS SECTION ==================== */
#reasons {
    background: linear-gradient(180deg, var(--light-pink) 0%, var(--white) 100%);
}

.cards-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    max-width: 1200px;
    width: 100%;
    padding: 20px;
}

.reason-card {
    background: var(--white);
    border-radius: 25px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: 0 10px 40px rgba(255, 107, 157, 0.15);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.reason-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-romantic);
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: 0;
}

.reason-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 50px rgba(255, 107, 157, 0.25);
}

.reason-card:hover::before {
    opacity: 1;
}

.reason-card:hover .reason-icon,
.reason-card:hover .reason-title,
.reason-card:hover .reason-text {
    color: var(--white);
    position: relative;
    z-index: 1;
}

.reason-icon {
    font-size: 3.5rem;
    margin-bottom: 20px;
    display: block;
    transition: all 0.4s ease;
}

.reason-title {
    font-family: var(--font-romantic);
    font-size: 2rem;
    font-weight: 600;
    color: var(--deep-red);
    margin-bottom: 15px;
    transition: color 0.4s ease;
    letter-spacing: 0.5px;
}

.reason-text {
    font-family: var(--font-body);
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--text-light);
    line-height: 1.7;
    transition: color 0.4s ease;
}

/* ==================== MUSIC SECTION ==================== */
#music {
    background: var(--gradient-romantic);
}

.music-player {
    background: var(--white);
    border-radius: 30px;
    padding: 50px 40px;
    max-width: 400px;
    width: 100%;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0,0,0,0.15);
}

.album-cover {
    width: 200px;
    height: 200px;
    margin: 0 auto 30px;
    position: relative;
    border-radius: 50%;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.album-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.album-cover.playing img {
    animation: spin 8s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.vinyl-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 30px;
    height: 30px;
    background: var(--white);
    border-radius: 50%;
    box-shadow: inset 0 0 10px rgba(0,0,0,0.1);
}

.player-info {
    margin-bottom: 30px;
}

.song-title {
    font-family: var(--font-romantic);
    font-size: 2.2rem;
    font-weight: 600;
    color: var(--deep-red);
    margin-bottom: 8px;
    letter-spacing: 0.5px;
}

.artist-name {
    font-family: var(--font-elegant);
    font-size: 1.1rem;
    font-style: italic;
    color: var(--text-light);
    font-weight: 400;
}

.player-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    margin-bottom: 30px;
}

.control-btn {
    width: 50px;
    height: 50px;
    border: none;
    border-radius: 50%;
    background: var(--light-pink);
    color: var(--deep-red);
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.control-btn:hover {
    background: var(--secondary-pink);
    transform: scale(1.1);
}

.play-btn {
    width: 70px;
    height: 70px;
    background: var(--gradient-romantic);
    color: var(--white);
    font-size: 1.5rem;
}

.play-btn:hover {
    background: var(--deep-red);
}

.progress-container {
    display: flex;
    align-items: center;
    gap: 15px;
}

.time {
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-light);
    min-width: 40px;
}

.progress-bar {
    flex: 1;
    height: 6px;
    background: var(--light-pink);
    border-radius: 3px;
    overflow: hidden;
    cursor: pointer;
}

.progress {
    height: 100%;
    width: 0%;
    background: var(--gradient-romantic);
    border-radius: 3px;
    transition: width 0.1s linear;
}

.volume-control {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
}

.volume-icon {
    font-size: 1.2rem;
}

#volumeSlider {
    width: 100px;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--light-pink);
    border-radius: 3px;
    outline: none;
    cursor: pointer;
}

#volumeSlider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    background: var(--primary-pink);
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.2s ease;
}

#volumeSlider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

#volumeSlider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    background: var(--primary-pink);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

/* ==================== LETTER SECTION ==================== */
#letter {
    background: linear-gradient(180deg, var(--secondary-pink) 0%, var(--light-pink) 100%);
    padding: 60px 20px;
}

.letter-container {
    max-width: 750px;
    width: 100%;
    perspective: 1000px;
}

.letter-paper {
    background: var(--white);
    border-radius: 5px;
    padding: 60px 55px;
    box-shadow: 
        0 0 0 1px rgba(0,0,0,0.05),
        0 20px 50px rgba(0,0,0,0.1),
        inset 0 0 100px rgba(255, 107, 157, 0.05);
    position: relative;
    background-image: 
        repeating-linear-gradient(
            transparent,
            transparent 35px,
            rgba(255, 107, 157, 0.08) 35px,
            rgba(255, 107, 157, 0.08) 36px
        );
    background-position: 0 60px;
}

.letter-paper::before {
    content: '';
    position: absolute;
    top: 0;
    left: 45px;
    width: 2px;
    height: 100%;
    background: rgba(255, 107, 157, 0.15);
}

.letter-header {
    text-align: right;
    margin-bottom: 35px;
    padding-bottom: 20px;
    border-bottom: 1px dashed var(--secondary-pink);
}

.letter-date {
    font-family: var(--font-elegant);
    font-style: italic;
    font-size: 1.1rem;
    color: var(--text-light);
    font-weight: 400;
}

.letter-content {
    font-family: var(--font-letter);
    font-size: 1.4rem;
    line-height: 2.2;
    color: var(--text-dark);
    min-height: 200px;
    font-weight: 400;
    letter-spacing: 0.3px;
}

.letter-content .cursor {
    display: inline-block;
    width: 2px;
    height: 1.5rem;
    background: var(--deep-red);
    animation: blink 0.7s infinite;
    vertical-align: middle;
    margin-left: 2px;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.letter-signature {
    text-align: right;
    margin-top: 45px;
    font-family: var(--font-romantic);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--deep-red);
    letter-spacing: 0.5px;
}

.signature-heart {
    display: block;
    font-size: 2.5rem;
    margin-top: 15px;
    animation: heartbeat 1s ease-in-out infinite;
}

/* ==================== FINAL MESSAGE ==================== */
.final-message {
    text-align: center;
    margin-top: 60px;
    opacity: 0;
    transform: scale(0.8);
    transition: all 0.8s ease;
}

.final-message.visible {
    opacity: 1;
    transform: scale(1);
}

.final-message h2 {
    font-family: var(--font-romantic);
    font-size: 4.5rem;
    font-weight: 700;
    color: var(--deep-red);
    text-shadow: 2px 2px 8px rgba(0,0,0,0.1);
    letter-spacing: 2px;
}

.heart-burst {
    position: relative;
    height: 100px;
    margin-top: 30px;
}

/* ==================== NAVIGATION BUTTONS ==================== */
.next-btn {
    background: var(--white);
    border: 2px solid var(--primary-pink);
    padding: 16px 45px;
    border-radius: 30px;
    font-family: var(--font-body);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--primary-pink);
    cursor: pointer;
    margin-top: 50px;
    transition: all 0.3s ease;
    letter-spacing: 0.5px;
}

.next-btn:hover {
    background: var(--primary-pink);
    color: var(--white);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(255, 107, 157, 0.3);
}

#music .next-btn {
    background: transparent;
    border-color: var(--white);
    color: var(--white);
}

#music .next-btn:hover {
    background: var(--white);
    color: var(--primary-pink);
}

/* ==================== RESPONSIVE DESIGN ==================== */
@media (max-width: 768px) {
    .intro-title {
        font-size: 2.8rem;
    }
    
    .intro-subtitle {
        font-size: 1.2rem;
    }
    
    .section-header h2 {
        font-size: 2.5rem;
    }
    
    .section-header p {
        font-size: 1.1rem;
    }
    
    .timeline-container::before {
        left: 20px;
    }
    
    .timeline-item,
    .timeline-item:nth-child(odd),
    .timeline-item:nth-child(even) {
        flex-direction: column;
        padding-left: 50px;
    }
    
    .timeline-item:nth-child(odd) .timeline-content,
    .timeline-item:nth-child(even) .timeline-content {
        margin: 0;
        text-align: left;
    }
    
    .timeline-dot {
        left: 20px;
        top: 30px;
        transform: translateX(-50%);
    }
    
    .timeline-title {
        font-size: 1.7rem;
    }
    
    .timeline-text {
        font-size: 1rem;
    }
    
    .cards-container {
        grid-template-columns: 1fr;
    }
    
    .reason-title {
        font-size: 1.7rem;
    }
    
    .reason-text {
        font-size: 1rem;
    }
    
    .music-player {
        padding: 30px 20px;
    }
    
    .album-cover {
        width: 150px;
        height: 150px;
    }
    
    .song-title {
        font-size: 1.8rem;
    }
    
    .letter-paper {
        padding: 35px 25px 35px 45px;
    }
    
    .letter-content {
        font-size: 1.2rem;
        line-height: 2;
    }
    
    .letter-signature {
        font-size: 1.3rem;
    }
    
    .final-message h2 {
        font-size: 3rem;
    }
}

@media (max-width: 480px) {
    .intro-title {
        font-size: 2.2rem;
    }
    
    .intro-subtitle {
        font-size: 1.1rem;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .heart-btn {
        padding: 15px 35px;
    }
    
    .heart-icon {
        font-size: 2rem;
    }
    
    .btn-text {
        font-size: 1.2rem;
    }
    
    .letter-content {
        font-size: 1.1rem;
    }
    
    .final-message h2 {
        font-size: 2.5rem;
    }
}